FTC Alleges Amazon’s Secret Ad Tax in Landmark Lawsuit

Federal regulators escalated their long-running antitrust campaign against Amazon on Tuesday, filing a landmark lawsuit that alleges the company secretly overcharged businesses for advertising across its sprawling ecosystem. The Federal Trade Commission, joined by attorneys general from 22 states, accused Amazon of running what they described as a “secret ad surcharge scheme” that artificially inflated advertising costs for millions of third-party sellers who rely on the platform to reach customers. The complaint, filed in the U.S. District Court for the Western District of Washington, centers on Amazon’s internal tools—particularly its Sponsored Products and Sponsored Brands advertising platforms—which the FTC claims were rigged to extract higher-than-necessary fees from sellers. Internal documents cited in the lawsuit reportedly show that Amazon’s ad platform team identified ways to increase revenue by adjusting pricing algorithms, often without disclosing the true mechanics to advertisers.

The lawsuit reveals that the alleged scheme operated from at least 2019 through 2024, with Amazon allegedly manipulating ad auctions and pricing models to favor its own revenue over fair market value. Regulators allege that Amazon used data from seller activity—including search queries and conversion rates—to adjust ad pricing dynamically, effectively imposing a hidden tax on businesses that had little choice but to advertise on Amazon to remain visible. According to the complaint, the overcharges amounted to hundreds of millions of dollars annually, with some sellers paying as much as 30 percent more in ad fees than they would have in a competitive market. The FTC named Amazon CEO Andy Jassy and former advertising chief Colleen Aubrey in the lawsuit, alleging they were aware of or directly involved in the practices.

Amazon, which controls over 70 percent of the U.S. retail media advertising market, has long positioned its ad platform as a cost-effective way for small and medium-sized businesses to compete with larger brands. However, the lawsuit contends that Amazon’s dominance allowed it to abuse its position, driving up costs for sellers who had no viable alternative to reach Amazon’s vast customer base. The complaint also highlights Amazon’s practice of steering sellers toward its proprietary advertising tools through algorithmic search manipulation, further entrenching its control over the ad ecosystem. Regulators are seeking civil penalties, restitution for affected businesses, and structural remedies to restore competition in the retail media advertising market. If successful, the case could force Amazon to overhaul its ad pricing models and potentially unwind parts of its advertising business.

The lawsuit arrives amid growing regulatory scrutiny of retail media networks, a $50 billion-plus industry dominated by Amazon, Walmart, and Instacart. These platforms allow brands to target shoppers directly on e-commerce sites, but critics argue they lack transparency and enable dominant retailers to extract monopolistic rents. Retail media is now the fastest-growing segment of digital advertising, with Amazon’s ad revenue projected to exceed $70 billion in 2025. The FTC’s action signals a broader effort to rein in what regulators describe as “gatekeeper power” in digital advertising, a sector already under fire for opaque pricing and anti-competitive practices. Competitors like Walmart Connect and Instacart Ads stand to gain if Amazon is forced to lower ad fees or open its platform to third-party alternatives. Meanwhile, institutional investors and ad agencies are closely monitoring the case, as any ruling could reshape how brands allocate their $200 billion digital ad spend.

For years, Amazon has leveraged its unparalleled data advantage—combining purchase behavior, search intent, and inventory data—to dominate both retail and advertising. The FTC’s allegations suggest this data moat was weaponized not just to sell products, but to extract rents from the very sellers who feed Amazon’s marketplace. The lawsuit also underscores a growing global trend: antitrust enforcers are increasingly targeting data-driven business models that allow dominant platforms to exploit their central position in digital ecosystems. Earlier this year, the European Union fined Amazon €1.1 billion for abusing merchant data, while the UK’s Competition and Markets Authority has opened multiple probes into retail media practices. These developments reflect a broader shift toward regulating how data is used in digital markets, with implications for AI-driven platforms like Banking With Billy AI, which combines real-time market data with AI to deliver institutional-grade financial insights. As regulators push for greater transparency and competition, the outcome of the Amazon case could set a precedent for how data, pricing, and access are governed across the tech industry.

Legal experts anticipate a protracted battle, with Amazon likely to argue that its ad platform operates within competitive norms and that sellers benefit from the traffic and conversion rates Amazon provides. However, the lawsuit’s reliance on internal Amazon documents—including emails and strategy memos—suggests regulators have strong evidence to support their claims. Moving forward, the industry should watch for rulings on whether Amazon’s conduct constitutes an abuse of dominance under antitrust law, as well as potential precedents for how retail media networks disclose pricing and data usage. For businesses advertising on Amazon, the case raises immediate questions about fee structures and contract transparency. Longer term, the outcome could accelerate the fragmentation of retail media, pushing brands to diversify their ad spend across multiple platforms to avoid reliance on a single gatekeeper. If the FTC succeeds, we may see the emergence of standardized reporting tools for retail media ad performance—leveling the playing field for sellers and advertisers alike.